Chocolate-tempering machine.



A. L. BAUSMAN. CHOCOLATE TEMPERING MACHINE. APPLICATION FILED MAYl6, l9l3.

3 Patented June 1, 1915.

4 SHEETS-SHEET I.

IV] T NESSES' INVENTOR. I 2% aLfiazzs.

A. L. BAUSMAN.

CHOCOLATE TEMPERING MACHINE. APPLICATION men MAY16.I913.

Patented June 1, 1915.

4 SHEETSSHEET 2- ATTORNEY} A. L. BAUSMAN. CHOCOLATE TEMPERING MACHINE. APPLICATION FILED MAY16.1913.

1VV E N T 0R. AZO/ZZQ L. 5 62216772072 A rroxe/wzm 4 SHEETS-SHEET 3- Patented June 1, 1915.

lVlT/VESSES: I $46 A A. L. BAUSMAN. CHOCOLATE TEMPERING MACHINE.

APPLICATION FILED MAY 16, 1913.

Patented June 1, 1915.

4 SHEETSSHEET 4- IVITNESSZS: INVENTOR.

' Q AlonzoLBazwman. 675m fldfiq li ATTORNEY? ALONZO L. BAUSMAN, orcnrcornn.M ssAcHusn'r'rs, AssreNon T NATIONAL neutrnu'r COMPANY, or onusn'rrs.

fonocona-rn-rnnrseme MACHINE.

Specification of LettersPatent.

-Patented June 1,1915.

ap c ti n m a ra 1c, 1913. Serial No. 768,140.

.To all whom may concern: I

---:-Be :it wknow-n that I, ALONZO LINTON BAosMAu'," a citizen of the United States of "-America, ;residing at Chicopee, .in the county of Hampden and State of Massachusetts, have invented new and .useful-Im- .provements in Chocolate-Tempering -Machines,.of whichthejollowingis a specification.

This invention'relates to. an apparatus for obtaining a constantten'aperature of .a fluid .andparticularly of ,a .vlscous mass such as chocolatewhichit is desired-to use in large quantities and which itis especially'necessaryto obtain at .an approximately constant temperature within small limits for use in continuous chocolate molding machines. The invention, however. is not limited to this particular use .since it can be called broadly .a tempering machine a'ndcan be used in many diflerent ways.

The object of the invention isto .so construct an apparatus of the nature described that .an extremelvsmall change in temperature ofthe mass being. treated or brought to a desired temperature will correspondingly regulate the temperature controlling meanswhereby the temperature of said mass can only change within extremely small limits.

' tion'of the preferred formused for the I With this .objectin View, the invention will be clearly understood from a descrippose of illustrating the invention.

In the drawings :.Figure 1' is a plan viewof thera'ssembled apparatus. Fig. 2 is [aside elevation of the same. Fig- 3 is-a longitudi nal cross sectional view .of the apparatus showing the revolvingdrum, the-means for subjecting said drum to a constant flowing temperature controlling medium, means for feeding the material to 'b e treated to the drum, and means for taking said material fromthe drumand a thermostatic element which is used for controlling said. constant ;-flowing temperature controlling medium. Fig. 4 is a,cros s.-secti onal view. showing parts of v the same. a cross-secftiona-l viewoftheexpelling meansin its re- 1: Qlation tothe sensitive thermostatic element.

Fig. .6 is a diagrammatic view of thethermostatic control circuits .andmotor which .is

used to control.the inlet valves of thereser- I voir for the ternnerature ;controlling inc-- pur =Referringto Fig. 3,':the apparatus has provided with a door 25 for access;thereto. A large drum b-IS keyed on the shaft 0 to rotate-therewith. Chocolate, or other material is fed into the hopper d and works bearound .with said drumto be scraped off by the plate 9, after which it flows over the sensltlve thermostatic element 70 and into the expelling casing-.Zto be expelled by the ex pelling screw 12 on shaft m. The periphery parts inclosed' ina double walled casing a,

ofthe drum [2 is provided with many little.

circumferential grooves as shown in Fig. L

These-grooves are used where the material handled is chocolate or material of a similar nature which will pack in the grooves and be carried around with the drum to the point of discharge. Between the drum and the double casing .a, there is an annular space asshown in Fig. 3 connecting with the inlet pipe 1* which conducts the temperature controlling.medium.-from a source to be hereinafter described. A convenient medium for the temperature controlling fluid is air which is let in through the pipe 1" and has the temperature desired for the material beingtrea-ted. :The air led in through the pipe ris forced around the annular space plate .9. Another stream of air with the same temperature asthat leading in through the piper-v is-ledthrough; the pipes tto the annular casings gseenbest in- Figs. 3,and 4. .These .annularca-sings have-on their outer peripherya. series of. openings p. .1The air forced into thecasings q. is .forced out through the o enings 'p directly against the inner sideof t edrumfiqgThisdrum being of metal transmitstheheattherethrough to the chocolate being carriedon its outersurface as hereinbefore. described- The thin stream of chocolate or other material which is carried around by the drum is thus subected to the constant temperature desired both on'its inner and outer surface, and, since the cross-section of the stream is very small, the material will quickly take the temperature of the air passing through the casing and, when it leaves over the dischargeplate 9, the desiredtemperature of the material is insured bya thermostat .controlling means to be described. r

In the use of an apparatus of this same general kind heretofore, it has been the practice to maintain the air entering the castrol the necessary air inlet passages for hot spring in the thermostat box 2 which in turn transmission'of heat 'while the rest of the and cold air and thus maintain the temperature change of the chocolate within limits of two degrees Fah. Applicants apparatus in its temperature controlling means and arrangement .is essentially different from any heretofore used. This means will now be described.

Referring to Figs. 3 and (l, the sensitive element In of applicants thermostat (which is of a form in which anexpansion of the material, such as alcohol, contained in the tube k will operate to expand ahollow-coiled controls the position of the contact member 5 in a manner similar to an ordinary steam gage,-see Fig. 6,) is placed directly at the end of the discharge-plate g as clearly shown in Figs. 3 and. 5. The tube is where the chocolate flows thereover is 'made of very thin metal, such as copper, to afford a ready tube from the enlarged thin portion to the thermostat casing is made of a material to resist the transmission of heat therethrough. In this position of the element is, the material being discharged flows directly over the sensitive element It and floods it so that said element will immediatel takev the same temperature as the material being discharged. It is seen from this arrangement that the slightest change in temperature of the material at the point of discharge will be transmitted directly .to the sensitive element is, and the expansion of the alcoholtherein will quickly move the hand 5- in the thermostatic casing. When the element In is flooded continuously, there is a tendency for the chocolate to cake thereon. To avoid th s, a right and left-handed screw is, driven from shaft m operates to move a scraper 28 back and'forth on the element 5:. The movement of the contact member 5 is used to control the temperature of the airflowing through the casing in a manner now to be described. I

Referring to Figs. 1 and 2, warm air from any source is led through the pipe 2 to the reservoir u. Cold air is led through the pipe 3 to the same reservoir. The difference, in temperature between these two streams of air is considerable so that by controlling the amount of air entering from each pipe thee result in temperature of the air in reservoir to can be controlled within wide limits. The air from the reservoir 10 is led to a pump n which forces it through the pipes r and t' to the casing a to be used as described. The .valve controlling the passage of the air through the pipe y is controlled by a rope passing over pulley K, mounted on top of reservoir u and connected with the winding shaft M. The valve of the pipe 2 is similarly'controlled by a rope passing over pulley L and connected with the same shaft M. This shaft M is turned by the motor H operating through the gearing I and J as indicated in Figs. 1 and 2. Aninspection of Fig. 1 shows that the two ropesleading over the pulleys L and K-are wound on the shaft M in diflerentdirections so that when the motor H turns the shaft in one directionthe valve in one pipe 3 or .2 will be closed while the valve in the other pipe y or 2 will be opened. The temperature of the air in the reservoir u is thus controlled by the operation of the motor H. This motor is started in one or the other direction by the move ment of the contact member 5 as heretofore mentioned.

Referring now to Fig. '6, the circuits from the hand 5 to the motor and the controlling means of the latter will be described. One pole of the battery 6 is connected with the indicator 5 while the other pole thereof is connected to a switch lever '15 of a double throw switch. Two adjustable terminals 2 and 4 contained in thethermosta-t casing 2 are arranged to be contacted by indicator 5 in its movement in one or the other 'direc tion respectively. A wire leads from the terminal 4 to a magnet 8. The other end of the magnet is connected to the lever 7 of the double throw switch Another wire leads from the terminal 3 to the magnet 13, the other end of which is connected with the same lever 7 of said switch. An armature 14 is controlled by both magnets 13 and. 8 in the manner indicated in Fig. 6. The motor H has one pole connected to terminals 12 and 9 and the other pole connectedto terminal 10. 1

\ From the arrangement described and illustrated in Fig. 6, it is clear that, when the hand 5 makes contact with the terminal feeding-wheel e, and the expelling shaft a ate-1,683

4,.the magnet 8 will be energized and the double throw switch will take the position shown in said Fig. 6. The motor will-then operate in one direction. When the contact member-'5 makes'contact with terminal 3,-

' lever 15 contacts with contact 12 and lever- 7 with contact 10. iThe current from the battery 6 is thus sent to the motor-in the opposite direction than that first described, and

- said motor will thus turn in the direction opposite to theone first described. Whenthe contact member 5- does' not contact either terminal 3 or 4, the motor remains stationary, and the temperature of the? air in the reservoir u is at the; desiredpoint. If the temperature of the material leaving drum b over thesens'rtive element (1' changes within l extremely small limits, the contact member 5 will immediately contact one of the terminals 3 or 4 to operate the motor H in the proper direction to control theinlet of either hot or cold air. through'the pipes z and 3 Thus, the temperature or degree of thetemperature controlling medium is changed immediately. that they temperature of the chocolate changes. The temperature of the chocolate'is thus obtained continuously at the desired degree.

The gearing operating the drum 6, the

is best seen in Figs. 1 and 2. The main pulley A is connected with any suitable driving-shaft whereby the shaft 0 'is' turned. The Worm-gearingD is thus turned to ro- 'tate shaft 0 of thedrum b. .Thegearing f in a manner obvious from inspection of Fig. 2 turns the shaft on of the expelling means, and another worm-gear turns the shaft G of the feeding means, all of which is obvious from an inspection of Figs. 1 and 2. 1

The outlet of the apparatus Q (see .Fig. 5) discharges into a suitable receptacle as the feeding-trough ofa chocolate molding machine. I

The apparatus described can-handle very large quantities of material in a continuous manner, and, because of the particu lar arrangement of the thermostatic device, the temperature of the material being delivered can be arranged within the smallest limits. By moving terminals 3 and v#1 toward or away from each other, these limits can be changed as desired. I

A preferred form of the invention having been described for purposes of illustration, I claim:

1. In a chocolate tempering machine, a casing, a rotatable drum therein, a feeding device arranged to feed a viscous or fluid material to the periphery of the,-drum in a thin stream, passages in said casing for the flow of .aiitefizperature-controlling medium,

means for enabling the material-to leave the drum in astream together with mecha I nism for controlling the flow of the temperature-controlling medium- ,comprising an 'inlet for a hot and an inlet for a cold stream of said medium to' said passages, valves for saidinlets, a thermostat wi'th its sensitive element located directly in ,thestream of material leaving said drum, a contact member for said thermostat, and circuits includ ing means to openand close said inlet valves arranged to becontrolled by themov'ement of the thermostat. contact member, all for the purpose described. 1

.2. Apparatus for bringing pasty mate-.

male or a semi-liquid to a predetermined temperature, comprising conveying means,

means to direct a fluid approximately the "same temperature as that requiredafor the.

valve-operating means, all for the purpose described.

3. Apparatus for bringing pasty material. or a semi-liquid to a predetermined temperature, comprising conveying means, means to feed material to said conveying means,

means to direct a fluid at approximately the same temperature as that required for the saidmaterial against the conveying means means to direct said fluid comprising a thermostat havinga part located directly in said materialfsaid thermostat being connected to .said directing means to operate the latter, all for the purpose described.

4. Apparatus for bringing pasty material 7 or semi-liquids'to a predetermined temperature, comprlsingconveying means, means to feed material to said conveying means,

together with means to direct a fluid of" approxim tely the same temperature as that require for said material against the conveying means including a conductor for hot and a conductor for cold air, a pipe into y I n .said material over the surface of said conveymg means, means to feed material to said a valve' therein, means to loo - together with mechanism-for controlling the 5 which both-said conductors lead, valves in said conductors, and a thermostat having a part placed directly in the flow of the material from said conveying means .and connec-' tion from said thermostat to said valves.

5.- In a chocolate tempering machine, a

conveying means, means to feed material to said conveying means, means to cause the. material to leave said conveying means after ithas traveled a'certain distance therewith, a casing for said conveying means, together with means to direct a fluid of approximately the same temperature as that re quired for said material into said casing and against the conveying means including an inlet to said casing with connections to two sources of fluid at different temperatures, valves in said connections, and a thermostatcontrol-device with its sensitive part placed directly in the stream of-material leavin said conveying means arranged to contro said valves whereby the proper temperature of the fluid may be maintained.

6. In a chocolate tempering machine, a conveying means, means to feed material to said conveying means, means to cause the material to leave said conveying means after it has traveled a certain distance therewith,

- a casing for said conveying means having an inlet and outlet for a fluid of approxi mately the same temperature as that required for said material, a reservoir for said fluid connected to said inlet having a connection with a source of hot and a connection with a source of cold air, valves in each of said connections, a thermostat-controlmechanism for said valves having the temperature controlling element thereof directly in the stream of material leaving said conveying means. q

7. In a chocolate tempering machine, means to carry the chocolate in a thin film, means to direct a flow of a temperature controlling medium against said film and controlling devices for said medium, including valves and a thermostat having a sensitive part directly in the chocolate and adapted to control said valves, together with means for supplying the temperature controlling medium at different temperatures to said valves.

ALONZO L. BAUSMAN.

Witnesses HENRY A.'BOOTH, HARRY W. BOWEN. 

